Improvement in guide for fitting locks to doors



@nicht @ritira FRANK P. PFLEGHAR. NEW HAVEN, CONNECTICUT.

Leners Patent No. 90,299, dated May 41s, 1869.

megeve-Mam IN- GUIDE :FOR FITTING LocKs'To noone.

l The Schedule referred toyin these Lettera Patent and making part of the same.

Awa-

To all 'whom 'it may concern.-

Be it known that I, FRANK P. PFLEGHAB, of the city and county of NewrHaven, in the State of Gonnecticut, have invented a new and useful Improvement in Tools, or Clamps, to be used as a Guide in Fitting Locks, 85o., to Doors; and I d o herebyldeclare that tbcfollowing is a full, clear, and exact description of the constructiom,character, and .operation of the same, reference being had tothe accompanying drawings, which make part of this specification, in which- Figure 1 is a perspective view of the tool, ready for use.

Figure 2 is a plan of the same, out horizontally through the centre, showing the rela-tive positions of the several parts, and their connections.

My improvement consists in making a block, with a series of holes through it, to serve as a guide for the auger, or bit, while boring for the mortise ofthe lock, and in fitting itwith a pair of clamps, worked, or adjusted by a right and left-hand screw, to iit the thickness of the stile of the door, to adjust the guides, so that the auger, or bit will bore in the exact centre of the thickness of the stile, and in connecting therewith guidesfor boring the key-hole and the hole for the spindle.

I make the block of cast-iron, or any other suitable material, substantially in the form represented at A and B, tig. 1, and indicated in section atA and B, iig. 2, v'with three, or any other convenient" number ot' holes through each of its wings, as represented at a. a a and b b b, of the-proper size to receive or admit the bit, or auger for boring the holes for the mortise, to receive the case ofthe lock, or lockand latch.

These holes, or guides, I make parallel, so that the auger, or bit will bore perfectly true, as represented at A and B, fig. l; and I make those in one wing, as in A, larger'than those in the other, as in B, as I intend them for fitting locks of dilierent sizes, so that each tool will be suited for tit-ting two sizes of locks, and will be peculiarly appropriate for fitting locks the breadth ofthe cases of which is three times its thickness, which is the most suitable shape when the lock and latch are used together.

IBut any other number of holes, or guides may be made, to suit any particular class of locks, and may he made oi"any desired size, and each may be made for two sizes, or classes of locks, as represented in fig. 1, as the clampswill be the same.

Through thecentre of this blockA and B, and at right angles to the guides a a cc and b b b, I littwo slides, as Gand I), one from each side, and connect them by a right and left-hand screw, as represented' at C and D, in.. section, in Iig. 2, and I hold this screw in its Vplace by va suitable chock,- or clutch, as shown at e, fig. 2, which lits between the collars on the screw-shank, as shown at g.

This chock I secure to the block A and 'B' by a small screw, as indicated at f, when it will hold the screw c d in its proper posit-ion. or prevent it from moving longitudinally.

To each of these slides O and D, I attach, or cast in one piece with it, a suitable plate, or clamp, as represented at E and F, to be pressed against the sides of the stile of the door, by the operation of the adjusting-screw c and d, each part of which works in a suitable internal, or female thread, as indicated at h andy,

' iig. 2, and at h, iig. l, so that, by revolving the screw c and d in the direction indicated bythe' dart: in iig. 1, it will cause the clamps e and f to m'ovc simultaneously and equally toward the guides a a a and b b b, until they come in contact with the opposite sides of the stile of the door, wher the guides will be in the position .to receive the auger, or bit, whichmay then, by the most unskiltul hand, be used to bore exactly perpendicularly to ille edge, .and parallel to the sides of the stile, so as not to inj nrethe door, ormisfit the lock.

On one ofthe plates, or clasps F, I cast, or fit two extensions, or projecting parts, as represented at G and H, tig. 1, in each of which I make' two suitable holes, one, as la or l, as a guide, Vthrough which to bore the key-hole, and the other, m or n, as a guide through which to bore the hole for the spindle of the knobs.

In the vprese-nt case, the holes Ic and m are fitted for use with the large guides'ct c c, and the holesl and 'n to use with the smaller guides b b b, in the lock and latch, for which my application for a patent is now on le in the Patent Office, but they may be made to fit any class oi' locks, or lock andlatch, which may he n made, by simply furnishing a Specimen of the lock to the maker ofthe tool.

Having made the several parts, I fit the two slides O and l), and the right and leichand screw c d, and secure the screw by the chock e, resting betweeufrthe vcollars ofthe shank of the screw, as represented at g, fig. 2, taking special care tlat the. screw c d is so ar ranged in the intern-.11,01` female thread, at hand j, as

to keep the plates, or clamps E and F, at equal dis tances from the centre oi' the guides a a a and b b b, so that when the parts are thus titted together, the

whole will appear as represented in lig. 1, and be ready foruse. l

To' use this tool, when the clamping plates E and F are sufficiently open, I pass them on to the stile of the door, until the face ot' the guides a and b sit flat against the edge of the stile.` I then revolve the screw c d in the direction indicated by the dart in `iig. 1, until the two'plates E and F press the opposite sides of the stile.

I'then insert the auger, or bit into the guide, and.

'bore as many holes as the width oi the lock-case re quires; and if I use the guides nt/c., I bore the key .hole at la, and the spindle-hole at m.; but, it'I use the guides b, 85o., I bore the key-hole atl, and the spindle hole at n.

by Letters Patent, is-- The advantages of my improvement consist in that, by the use of this tool, an inexperienced person may t'a. lockwith accuracy, while the most experienced will find it extremely convenient, as it obvietes` the necessity o'f measuremennsnd vconsiderable care, especielly with thin doors.

What I claim as my invention; and desire to secure The combination of tlie Yblock A B, clamps E and stx-noted and arranged to operate as shown, and for the purposes substantially as herein described.

' Y F. I. PFLEGHAR.

Witnesses: v

` R. FITZGERALD, 'H. BERKELE.

F, chock e, and screw e d, when all the parts are con- 

